init.c 16 KB

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  1. /*
  2. * This file is provided under a dual BSD/GPLv2 license. When using or
  3. * redistributing this file, you may do so under either license.
  4. *
  5. * GPL LICENSE SUMMARY
  6. *
  7. * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
  8. *
  9. * This program is free software; you can redistribute it and/or modify
  10. * it under the terms of version 2 of the GNU General Public License as
  11. * published by the Free Software Foundation.
  12. *
  13. * This program is distributed in the hope that it will be useful, but
  14. * WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16. * General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  21. * The full GNU General Public License is included in this distribution
  22. * in the file called LICENSE.GPL.
  23. *
  24. * BSD LICENSE
  25. *
  26. * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
  27. * All rights reserved.
  28. *
  29. * Redistribution and use in source and binary forms, with or without
  30. * modification, are permitted provided that the following conditions
  31. * are met:
  32. *
  33. * * Redistributions of source code must retain the above copyright
  34. * notice, this list of conditions and the following disclaimer.
  35. * * Redistributions in binary form must reproduce the above copyright
  36. * notice, this list of conditions and the following disclaimer in
  37. * the documentation and/or other materials provided with the
  38. * distribution.
  39. * * Neither the name of Intel Corporation nor the names of its
  40. * contributors may be used to endorse or promote products derived
  41. * from this software without specific prior written permission.
  42. *
  43. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  44. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  45. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  46. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  47. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  48. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  49. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  50. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  51. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  52. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  53. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  54. */
  55. #include <linux/kernel.h>
  56. #include <linux/init.h>
  57. #include <linux/module.h>
  58. #include <linux/firmware.h>
  59. #include <linux/efi.h>
  60. #include <asm/string.h>
  61. #include <scsi/scsi_host.h>
  62. #include "isci.h"
  63. #include "task.h"
  64. #include "probe_roms.h"
  65. #define MAJ 1
  66. #define MIN 0
  67. #define BUILD 0
  68. #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
  69. __stringify(BUILD)
  70. MODULE_VERSION(DRV_VERSION);
  71. static struct scsi_transport_template *isci_transport_template;
  72. static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = {
  73. { PCI_VDEVICE(INTEL, 0x1D61),},
  74. { PCI_VDEVICE(INTEL, 0x1D63),},
  75. { PCI_VDEVICE(INTEL, 0x1D65),},
  76. { PCI_VDEVICE(INTEL, 0x1D67),},
  77. { PCI_VDEVICE(INTEL, 0x1D69),},
  78. { PCI_VDEVICE(INTEL, 0x1D6B),},
  79. { PCI_VDEVICE(INTEL, 0x1D60),},
  80. { PCI_VDEVICE(INTEL, 0x1D62),},
  81. { PCI_VDEVICE(INTEL, 0x1D64),},
  82. { PCI_VDEVICE(INTEL, 0x1D66),},
  83. { PCI_VDEVICE(INTEL, 0x1D68),},
  84. { PCI_VDEVICE(INTEL, 0x1D6A),},
  85. {}
  86. };
  87. MODULE_DEVICE_TABLE(pci, isci_id_table);
  88. /* linux isci specific settings */
  89. unsigned char no_outbound_task_to = 20;
  90. module_param(no_outbound_task_to, byte, 0);
  91. MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)");
  92. u16 ssp_max_occ_to = 20;
  93. module_param(ssp_max_occ_to, ushort, 0);
  94. MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)");
  95. u16 stp_max_occ_to = 5;
  96. module_param(stp_max_occ_to, ushort, 0);
  97. MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)");
  98. u16 ssp_inactive_to = 5;
  99. module_param(ssp_inactive_to, ushort, 0);
  100. MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)");
  101. u16 stp_inactive_to = 5;
  102. module_param(stp_inactive_to, ushort, 0);
  103. MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)");
  104. unsigned char phy_gen = 3;
  105. module_param(phy_gen, byte, 0);
  106. MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)");
  107. unsigned char max_concurr_spinup = 1;
  108. module_param(max_concurr_spinup, byte, 0);
  109. MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
  110. static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
  111. {
  112. struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
  113. struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
  114. struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
  115. return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
  116. }
  117. static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
  118. struct device_attribute *isci_host_attrs[] = {
  119. &dev_attr_isci_id,
  120. NULL
  121. };
  122. static struct scsi_host_template isci_sht = {
  123. .module = THIS_MODULE,
  124. .name = DRV_NAME,
  125. .proc_name = DRV_NAME,
  126. .queuecommand = sas_queuecommand,
  127. .target_alloc = sas_target_alloc,
  128. .slave_configure = sas_slave_configure,
  129. .slave_destroy = sas_slave_destroy,
  130. .scan_finished = isci_host_scan_finished,
  131. .scan_start = isci_host_scan_start,
  132. .change_queue_depth = sas_change_queue_depth,
  133. .change_queue_type = sas_change_queue_type,
  134. .bios_param = sas_bios_param,
  135. .can_queue = ISCI_CAN_QUEUE_VAL,
  136. .cmd_per_lun = 1,
  137. .this_id = -1,
  138. .sg_tablesize = SG_ALL,
  139. .max_sectors = SCSI_DEFAULT_MAX_SECTORS,
  140. .use_clustering = ENABLE_CLUSTERING,
  141. .eh_device_reset_handler = sas_eh_device_reset_handler,
  142. .eh_bus_reset_handler = isci_bus_reset_handler,
  143. .slave_alloc = sas_slave_alloc,
  144. .target_destroy = sas_target_destroy,
  145. .ioctl = sas_ioctl,
  146. .shost_attrs = isci_host_attrs,
  147. };
  148. static struct sas_domain_function_template isci_transport_ops = {
  149. /* The class calls these to notify the LLDD of an event. */
  150. .lldd_port_formed = isci_port_formed,
  151. .lldd_port_deformed = isci_port_deformed,
  152. /* The class calls these when a device is found or gone. */
  153. .lldd_dev_found = isci_remote_device_found,
  154. .lldd_dev_gone = isci_remote_device_gone,
  155. .lldd_execute_task = isci_task_execute_task,
  156. /* Task Management Functions. Must be called from process context. */
  157. .lldd_abort_task = isci_task_abort_task,
  158. .lldd_abort_task_set = isci_task_abort_task_set,
  159. .lldd_clear_aca = isci_task_clear_aca,
  160. .lldd_clear_task_set = isci_task_clear_task_set,
  161. .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset,
  162. .lldd_lu_reset = isci_task_lu_reset,
  163. .lldd_query_task = isci_task_query_task,
  164. /* Port and Adapter management */
  165. .lldd_clear_nexus_port = isci_task_clear_nexus_port,
  166. .lldd_clear_nexus_ha = isci_task_clear_nexus_ha,
  167. /* Phy management */
  168. .lldd_control_phy = isci_phy_control,
  169. };
  170. /******************************************************************************
  171. * P R O T E C T E D M E T H O D S
  172. ******************************************************************************/
  173. /**
  174. * isci_register_sas_ha() - This method initializes various lldd
  175. * specific members of the sas_ha struct and calls the libsas
  176. * sas_register_ha() function.
  177. * @isci_host: This parameter specifies the lldd specific wrapper for the
  178. * libsas sas_ha struct.
  179. *
  180. * This method returns an error code indicating sucess or failure. The user
  181. * should check for possible memory allocation error return otherwise, a zero
  182. * indicates success.
  183. */
  184. static int isci_register_sas_ha(struct isci_host *isci_host)
  185. {
  186. int i;
  187. struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
  188. struct asd_sas_phy **sas_phys;
  189. struct asd_sas_port **sas_ports;
  190. sas_phys = devm_kzalloc(&isci_host->pdev->dev,
  191. SCI_MAX_PHYS * sizeof(void *),
  192. GFP_KERNEL);
  193. if (!sas_phys)
  194. return -ENOMEM;
  195. sas_ports = devm_kzalloc(&isci_host->pdev->dev,
  196. SCI_MAX_PORTS * sizeof(void *),
  197. GFP_KERNEL);
  198. if (!sas_ports)
  199. return -ENOMEM;
  200. /*----------------- Libsas Initialization Stuff----------------------
  201. * Set various fields in the sas_ha struct:
  202. */
  203. sas_ha->sas_ha_name = DRV_NAME;
  204. sas_ha->lldd_module = THIS_MODULE;
  205. sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0];
  206. /* set the array of phy and port structs. */
  207. for (i = 0; i < SCI_MAX_PHYS; i++) {
  208. sas_phys[i] = &isci_host->phys[i].sas_phy;
  209. sas_ports[i] = &isci_host->ports[i].sas_port;
  210. }
  211. sas_ha->sas_phy = sas_phys;
  212. sas_ha->sas_port = sas_ports;
  213. sas_ha->num_phys = SCI_MAX_PHYS;
  214. sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL;
  215. sas_ha->lldd_max_execute_num = 1;
  216. sas_ha->strict_wide_ports = 1;
  217. sas_register_ha(sas_ha);
  218. return 0;
  219. }
  220. static void isci_unregister(struct isci_host *isci_host)
  221. {
  222. struct Scsi_Host *shost;
  223. if (!isci_host)
  224. return;
  225. shost = isci_host->shost;
  226. sas_unregister_ha(&isci_host->sas_ha);
  227. sas_remove_host(isci_host->shost);
  228. scsi_remove_host(isci_host->shost);
  229. scsi_host_put(isci_host->shost);
  230. }
  231. static int __devinit isci_pci_init(struct pci_dev *pdev)
  232. {
  233. int err, bar_num, bar_mask = 0;
  234. void __iomem * const *iomap;
  235. err = pcim_enable_device(pdev);
  236. if (err) {
  237. dev_err(&pdev->dev,
  238. "failed enable PCI device %s!\n",
  239. pci_name(pdev));
  240. return err;
  241. }
  242. for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++)
  243. bar_mask |= 1 << (bar_num * 2);
  244. err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME);
  245. if (err)
  246. return err;
  247. iomap = pcim_iomap_table(pdev);
  248. if (!iomap)
  249. return -ENOMEM;
  250. pci_set_master(pdev);
  251. err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
  252. if (err) {
  253. err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
  254. if (err)
  255. return err;
  256. }
  257. err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
  258. if (err) {
  259. err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
  260. if (err)
  261. return err;
  262. }
  263. return 0;
  264. }
  265. static int num_controllers(struct pci_dev *pdev)
  266. {
  267. /* bar size alone can tell us if we are running with a dual controller
  268. * part, no need to trust revision ids that might be under broken firmware
  269. * control
  270. */
  271. resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
  272. resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
  273. if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
  274. smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
  275. return SCI_MAX_CONTROLLERS;
  276. else
  277. return 1;
  278. }
  279. static int isci_setup_interrupts(struct pci_dev *pdev)
  280. {
  281. int err, i, num_msix;
  282. struct isci_host *ihost;
  283. struct isci_pci_info *pci_info = to_pci_info(pdev);
  284. /*
  285. * Determine the number of vectors associated with this
  286. * PCI function.
  287. */
  288. num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
  289. for (i = 0; i < num_msix; i++)
  290. pci_info->msix_entries[i].entry = i;
  291. err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix);
  292. if (err)
  293. goto intx;
  294. for (i = 0; i < num_msix; i++) {
  295. int id = i / SCI_NUM_MSI_X_INT;
  296. struct msix_entry *msix = &pci_info->msix_entries[i];
  297. irq_handler_t isr;
  298. ihost = pci_info->hosts[id];
  299. /* odd numbered vectors are error interrupts */
  300. if (i & 1)
  301. isr = isci_error_isr;
  302. else
  303. isr = isci_msix_isr;
  304. err = devm_request_irq(&pdev->dev, msix->vector, isr, 0,
  305. DRV_NAME"-msix", ihost);
  306. if (!err)
  307. continue;
  308. dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
  309. while (i--) {
  310. id = i / SCI_NUM_MSI_X_INT;
  311. ihost = pci_info->hosts[id];
  312. msix = &pci_info->msix_entries[i];
  313. devm_free_irq(&pdev->dev, msix->vector, ihost);
  314. }
  315. pci_disable_msix(pdev);
  316. goto intx;
  317. }
  318. return 0;
  319. intx:
  320. for_each_isci_host(i, ihost, pdev) {
  321. err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr,
  322. IRQF_SHARED, DRV_NAME"-intx", ihost);
  323. if (err)
  324. break;
  325. }
  326. return err;
  327. }
  328. static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
  329. {
  330. struct isci_host *isci_host;
  331. struct Scsi_Host *shost;
  332. int err;
  333. isci_host = devm_kzalloc(&pdev->dev, sizeof(*isci_host), GFP_KERNEL);
  334. if (!isci_host)
  335. return NULL;
  336. isci_host->pdev = pdev;
  337. isci_host->id = id;
  338. shost = scsi_host_alloc(&isci_sht, sizeof(void *));
  339. if (!shost)
  340. return NULL;
  341. isci_host->shost = shost;
  342. err = isci_host_init(isci_host);
  343. if (err)
  344. goto err_shost;
  345. SHOST_TO_SAS_HA(shost) = &isci_host->sas_ha;
  346. isci_host->sas_ha.core.shost = shost;
  347. shost->transportt = isci_transport_template;
  348. shost->max_id = ~0;
  349. shost->max_lun = ~0;
  350. shost->max_cmd_len = MAX_COMMAND_SIZE;
  351. err = scsi_add_host(shost, &pdev->dev);
  352. if (err)
  353. goto err_shost;
  354. err = isci_register_sas_ha(isci_host);
  355. if (err)
  356. goto err_shost_remove;
  357. return isci_host;
  358. err_shost_remove:
  359. scsi_remove_host(shost);
  360. err_shost:
  361. scsi_host_put(shost);
  362. return NULL;
  363. }
  364. static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  365. {
  366. struct isci_pci_info *pci_info;
  367. int err, i;
  368. struct isci_host *isci_host;
  369. const struct firmware *fw = NULL;
  370. struct isci_orom *orom = NULL;
  371. char *source = "(platform)";
  372. dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
  373. pdev->revision);
  374. pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
  375. if (!pci_info)
  376. return -ENOMEM;
  377. pci_set_drvdata(pdev, pci_info);
  378. if (efi_enabled)
  379. orom = isci_get_efi_var(pdev);
  380. if (!orom)
  381. orom = isci_request_oprom(pdev);
  382. for (i = 0; orom && i < ARRAY_SIZE(orom->ctrl); i++) {
  383. if (sci_oem_parameters_validate(&orom->ctrl[i])) {
  384. dev_warn(&pdev->dev,
  385. "[%d]: invalid oem parameters detected, falling back to firmware\n", i);
  386. devm_kfree(&pdev->dev, orom);
  387. orom = NULL;
  388. break;
  389. }
  390. }
  391. if (!orom) {
  392. source = "(firmware)";
  393. orom = isci_request_firmware(pdev, fw);
  394. if (!orom) {
  395. /* TODO convert this to WARN_TAINT_ONCE once the
  396. * orom/efi parameter support is widely available
  397. */
  398. dev_warn(&pdev->dev,
  399. "Loading user firmware failed, using default "
  400. "values\n");
  401. dev_warn(&pdev->dev,
  402. "Default OEM configuration being used: 4 "
  403. "narrow ports, and default SAS Addresses\n");
  404. }
  405. }
  406. if (orom)
  407. dev_info(&pdev->dev,
  408. "OEM SAS parameters (version: %u.%u) loaded %s\n",
  409. (orom->hdr.version & 0xf0) >> 4,
  410. (orom->hdr.version & 0xf), source);
  411. pci_info->orom = orom;
  412. err = isci_pci_init(pdev);
  413. if (err)
  414. return err;
  415. for (i = 0; i < num_controllers(pdev); i++) {
  416. struct isci_host *h = isci_host_alloc(pdev, i);
  417. if (!h) {
  418. err = -ENOMEM;
  419. goto err_host_alloc;
  420. }
  421. pci_info->hosts[i] = h;
  422. }
  423. err = isci_setup_interrupts(pdev);
  424. if (err)
  425. goto err_host_alloc;
  426. for_each_isci_host(i, isci_host, pdev)
  427. scsi_scan_host(isci_host->shost);
  428. return 0;
  429. err_host_alloc:
  430. for_each_isci_host(i, isci_host, pdev)
  431. isci_unregister(isci_host);
  432. return err;
  433. }
  434. static void __devexit isci_pci_remove(struct pci_dev *pdev)
  435. {
  436. struct isci_host *ihost;
  437. int i;
  438. for_each_isci_host(i, ihost, pdev) {
  439. isci_unregister(ihost);
  440. isci_host_deinit(ihost);
  441. sci_controller_disable_interrupts(ihost);
  442. }
  443. }
  444. static struct pci_driver isci_pci_driver = {
  445. .name = DRV_NAME,
  446. .id_table = isci_id_table,
  447. .probe = isci_pci_probe,
  448. .remove = __devexit_p(isci_pci_remove),
  449. };
  450. static __init int isci_init(void)
  451. {
  452. int err;
  453. pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
  454. DRV_NAME, DRV_VERSION);
  455. isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
  456. if (!isci_transport_template)
  457. return -ENOMEM;
  458. err = pci_register_driver(&isci_pci_driver);
  459. if (err)
  460. sas_release_transport(isci_transport_template);
  461. return err;
  462. }
  463. static __exit void isci_exit(void)
  464. {
  465. pci_unregister_driver(&isci_pci_driver);
  466. sas_release_transport(isci_transport_template);
  467. }
  468. MODULE_LICENSE("Dual BSD/GPL");
  469. MODULE_FIRMWARE(ISCI_FW_NAME);
  470. module_init(isci_init);
  471. module_exit(isci_exit);